[PATCH] tools/xc: restore logging in xc_save

[Olaf Hering <olaf@aepfle.de>]

# HG changeset patch
# User Olaf Hering <olaf@aepfle.de>
# Date 1359745022 -3600
# Node ID d76b38b799293ff17fed8eaaac8fbbebced1b72f
# Parent  6d1d516ecaade56f796e3216e9931fdcc12282cd
tools/xc: restore logging in xc_save

Prior to xen-4.1 the helper xc_save would print some progress during
migration. With the new xc_interface_open API no more messages were
printed because no logger was configured.

Restore previous behaviour by providing a logger. The progress in
xc_domain_save will be disabled because its output lacks a linefeed
which makes xend.log look ugly.

Signed-off-by: Olaf Hering <olaf@aepfle.de>

diff -r 6d1d516ecaad -r d76b38b79929 tools/xcutils/xc_save.c
--- a/tools/xcutils/xc_save.c
+++ b/tools/xcutils/xc_save.c
@@ -166,17 +166,15 @@ static int switch_qemu_logdirty(int domi
 int
 main(int argc, char **argv)
 {
-    unsigned int maxit, max_f;
+    unsigned int maxit, max_f, lflags;
     int io_fd, ret, port;
     struct save_callbacks callbacks;
+    xentoollog_level lvl;
+    xentoollog_logger *l;
 
     if (argc != 6)
         errx(1, "usage: %s iofd domid maxit maxf flags", argv[0]);
 
-    si.xch = xc_interface_open(0,0,0);
-    if (!si.xch)
-        errx(1, "failed to open control interface");
-
     io_fd = atoi(argv[1]);
     si.domid = atoi(argv[2]);
     maxit = atoi(argv[3]);
@@ -185,6 +183,13 @@ main(int argc, char **argv)
 
     si.suspend_evtchn = -1;
 
+    lvl = si.flags & XCFLAGS_DEBUG ? XTL_DEBUG: XTL_DETAIL;
+    lflags = XTL_STDIOSTREAM_HIDE_PROGRESS;
+    l = (xentoollog_logger *)xtl_createlogger_stdiostream(stderr, lvl, lflags);
+    si.xch = xc_interface_open(l, 0, 0);
+    if (!si.xch)
+        errx(1, "failed to open control interface");
+
     si.xce = xc_evtchn_open(NULL, 0);
     if (si.xce == NULL)
         warnx("failed to open event channel handle");